I've had some luck with one of those little parts pickup tools, the kind with a plunger on one end, and four steel claws on the other end.
$1-3 depending on where you find one.
It won't take 30 minutes to pick up something with one of these 
They have a good bit of grip once the jaws get around the item, so unless it's really wedged in tight you should be able to get it out.
Harbor Freight sells them in a two-pack...
http://www.harborfreight.com/cpi/ctaf/Displayitem.taf?itemnumber=1826
The magnetic one might work too on a steel key, but it would probably stick to the seat rail.
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Bob Roe
Lehigh Valley PA USA
1973 Olds 88, 1972 MB 280SE, 1978 Datsun 280Z, 1971 Ford T-Bird, 1972 Olds 88, 1983 Nissan Sentra, 1985 Sentra, 1973 230.6, 1990 Acura Integra, 1991 Volvo 940GLE wagon, 1983 300SD, 1984 300SD, 1995 Subaru Legacy L wagon, 2002 Mountaineer, 1991 300TE wagon, 2008 Murano, 2007 R320CDI 4Matic 52K, some Hyundai, 2008 BMW 535xi wagon, all gone... currently
2007 Honda Odyssey Touring, 2014 E350 4matic
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